Cellulose solution.



UN TED STATES PATENT orrioia.

v ERNST WILLY FRIEDRICH, OF BLATON, BEIlGlUM.

hCELLULOSE SQLUTION.

Specification of Letters Patent.

Patented Feb. 2'7, 19 06.

Application filed AugustZZ, 1905. Serial No. 275,228.

To all whom it may concernr I Be it known that I, ERNST W LL: Fawn RICH,a subg'ect of the German Emperor, and a resident of Bis-ton, in theKingdom of Bel- 5' gium, have invented new and useful Improvements inCellulose" Solutions, of which the following is a full, clear, and exactspecification. The object of my invention is a process for 1 o theproduction of cellulose solutions,in which process solutions of cupricoXid alkylamin are employed in the place of the hithertouscd solutionsof cupric oXid ammonia.

The use of my solvent has the advantage that more concentrated solutionsof cellulose are obtained than by aid of cupric oxid arnmonia. Moreover,ss alkylamin is necessary than ammonia for this better eflect. Further,my solutions are more viscous and 2o keep unchanged at ordinarytemperature.

My solution can be used in the manufacture of artificial threads or canbe used in the manufacture of films, as agglutinants, for impregnation,for the production of celluloid- 2 5 like substances, leatherimitations, linoleunr imitations, &c.

The use of my solutions in the manufacture of threads has importantadvantages compared with the use of other solutions.

The coagulation is done very quickly and the resulting thread is soresilient that broken threads are almost entirely avoided. The thread,therefore, can be Wound up with a high speed, and it can be made, inconse- 5 quence, in most of thespinning-machines.

Further, the threads can be washed very easily, owing to the highsolubility of the resulting alkylamin salts. The spinning mass can bemixed with any of the known sub- 40 stances, rendering the threadseither soft or stifi'. After being washed the threads show all physicalqualities of silk.

\ My process is carried out by dissolving cellulosc of any origin in asolution of cupric oxid allrylamin, either directly or after-havingdisintegrated the cellulose by any known process, (memorization,hydration, oxidatron.) l have found it'even more practical to combinethe production of cupric oxid alkylamin with the solution of thecellulosr this solution being accelerated.

Example: Three hundred and twenty (320) grams of Well-cleaned celluloseare moistened with hot water, fairly pressed, and then in a wetcondition put into three thousand four hundred (3,400) cubic centimetersof a solution of caustic soda of thirty (30) degrees Baum. Themercerizationbeing linished, two hundred and fifty (250) grams ofpulverized copper sulfate re slo'wiy added.

Now I separate by filtration the water containing dissolved sodiumsuifate. Then ipress, triturate the Wet mass, and add there upon athirty (30) per cent. solution of rnonomethylamin in water, anyelevation of tem perature being avoided. The mass will instantaneouslygelatinize and afterward be completely dissolved.

. In the place of monomethylaniin alsootheralkylamins which producesoluble compounds with cupric oxid may be used.

My process at the same time oifers the advantage of utilizing withprofit the alkylalnins resulting as by-products, for instance, from theWorkin" up of molasses and which have been up to i ate nearly worthless.

What I claim is T 1. The process for the production of solu tions ofcellulose consisting in subjecting cellnlose of any origin to thedissolving action of solutions of cupric oxid alkylainin, subpersulfate, filtering, triturzitingthe residue cellulose with hot water,pressing, treating] tions containing cellulose and cupric oxid 1o with'asolution of caustic soda, adding copmonomethylennn,substantially asdescribed.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing Witnesses,

ERNST WILLY FRIEDRICH.

and eddinv a solution of monomethylemin, substantieily as described.

5. As it new composition of matter solutions containing cellulose andcumin: oxid Witnossesz.

'elkylamin, substantially {LS described. G130. W. ROosEVELT.

6. As a new composition of matter solu- GREGORY PHELAN.

